#10852: ghc 7.8.4 on arm - panic: Simplifier ticks exhausted ---------------------------------------+------------------------------ Reporter: andrewufrank | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.2 Resolution: | Keywords: arm Operating System: Linux | Architecture: arm Type of failure: Compile-time crash | Test Case: Blocked By: | Blocking: Related Tickets: #5642, #9675 | Differential Rev(s): Wiki Page: | ---------------------------------------+------------------------------ Comment (by bgamari): While I have no problem compiling `Conll`, the `Brown` module is indeed quite problematic, even on my laptop. This module produces an absolutely absurd amount of Core which appears to originate from the generic `Serialize` instances for the quite large `Tag` type. The attached `Test.hs` reproduces the blow-up. While the code size starts large-but-not insane, {{{ Result size of Desugar (after optimization) = {terms: 25,522, types: 972,788, coercions: 376,020} }}} Things quickly balloon during float-out, {{{ *** Float out(FOS {Lam = Just 0, Consts = True, OverSatApps = False}): Result size of Float out(FOS {Lam = Just 0, Consts = True, OverSatApps = False}) = {terms: 254,872, types: 3,162,281, coercions: 634,615} }}} which the simplifier, through a great deal of effort, manages to reduce down to, {{{ Result size of CorePrep = {terms: 49,840, types: 1,752,631, coercions: 442,468} }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10852#comment:10 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler